scholarly journals Integration of imaging modalities in digital dental workflows - possibilities, limitations, and potential future developments

2021 ◽  
pp. 20210268
Author(s):  
Sohaib Shujaat ◽  
Michael M. Bornstein ◽  
Jeffery B. Price ◽  
Reinhilde Jacobs
Keyword(s):  
Three Dimensional ◽  
Clinical Problem ◽  
Cone Beam ◽  
Main Ingredient ◽  
Digital Workflow ◽  
Computed Tomographic ◽  
Tomography Image ◽  
Tomographic Data ◽  
Computed Tomography Image

The digital workflow process follows different steps for all dental specialties. However, the main ingredient for the diagnosis, treatment planning and follow-up workflow recipes is the imaging chain. The steps in the imaging chain usually include all or at least some of the following modalities: cone-beam computed tomographic data acquisition, segmentation of the cone-beam computed tomography image, intraoral scanning, facial three-dimensional soft tissue capture and superimposition of all the images for the creation of a virtual augmented model. As a relevant clinical problem, the accumulation of error at each step of the chain might negatively influence the final outcome. For an efficient digital workflow, it is important to be aware of the existing challenges within the imaging chain. Furthermore, artificial intelligence-based strategies need to be integrated in the future to make the workflow more simplified, accurate and efficient.

scholarly journals Appendiceal cancer leading to intussusception detected incidentally during follow-up for Peutz–Jeghers syndrome

2020 ◽  
Vol 13 (6) ◽  
pp. 1136-1143
Author(s):  
Kazuhiro Kurihara ◽  
Takanori Suganuma
Keyword(s):  
Malignant Tumors ◽  
Endoscopic Examination ◽  
Autosomal Dominant Disorder ◽  
Tomography Image ◽  
Elevated Lesion ◽  
Poorly Differentiated ◽  
Lower Endoscopy ◽  
Peutz Jeghers Syndrome ◽  
Computed Tomography Image

AbstractPeutz–Jeghers syndrome is an autosomal dominant disorder characterized by hamartomatous polyposis, pigmentation, and malignant tumors. We report a case of ileocecal carcinoma that was incidentally detected during follow-up for Peutz–Jeghers syndrome. A 39-year-old man with solitary Peutz–Jeghers syndrome had undergone three abdominal surgeries. He had been followed up via upper and lower gastrointestinal endoscopy and small intestinal endoscopy. In the endoscopic examination of the lower gastrointestinal tract, a 35 mm large, bumpy, elevated lesion was observed in the cecum. This lesion was not observed 9 months earlier during lower endoscopy. Biopsy of the specimen confirmed tubulovillous adenoma and carcinoma. This lesion was judged to be an indication for operation, and we performed ileocecectomy + D3 lymph node dissection. From the excised specimen, poorly differentiated carcinoma and adenoma components in contact with Peutz–Jeghers-type polyps in the appendix were recognized. A review of the computed tomography image obtained 2 years ago confirmed appendiceal swelling. We suspect that the ileocecal carcinoma in the appendix may have rapidly developed within the 9 months, and was incidentally detected on lower endoscopic examination during follow-up. For the prevention of appendicular tumorigenesis, prophylactic appendectomy may be considered in certain cases during follow-up for Peutz–Jeghers syndrome.

Tooth autotransplantation in a patient with rapidly progressing periodontitis aided by 3D printing

2021 ◽  
Vol 14 (8) ◽  
pp. e243601
Author(s):  
Hongyi Adrian Shi ◽  
Shu Fen Dawn Siow ◽  
Zong You Jonathan Phua
Keyword(s):  
Tooth Loss ◽  
Three Dimensional ◽  
Third Molar ◽  
Cone Beam ◽  
Viable Option ◽  
Clinical Attachment Loss ◽  
Three Dimensional Printing ◽  
Mandibular Third Molar ◽  
Dimensional Printing

Patients with rapidly progressing periodontitis may require extractions of teeth with poor periodontal prognosis. Although replacement with a dental implant is a popular choice, teeth autotransplantation remains a viable option. Herein, we report a case of a 23-year-old patient with rapidly progressing periodontitis resulting in severe clinical attachment loss on the left maxillary first molar, which required extraction. The tooth was replaced by tooth autotransplantation of the unerupted immature left mandibular third molar, which was delivered carefully without compromising the periodontal ligament. Cone beam computed tomography and three-dimensional printing of the third molar donor tooth significantly aided the tooth autotransplantation procedure. Recovery was uneventful. At the 1-year follow-up, healthy periodontal parameters and radiographic features were noted, and the autotransplanted tooth remained vital. This case showed that tooth autotransplantation is a viable option for replacing tooth loss due to rapidly progressing periodontitis.

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